1. Department of Internal Medicine, University of Texas Health Science Center at Houston, Houston, Texas.
2. Department of Endocrine Neoplasia and Hormonal Disorders, The University of Texas MD Anderson Cancer Center, Houston, Texas.
3. Department of Diabetes, Endocrinology, and Metabolism, Baylor College of Medicine, Houston, Texas.
4. Department of Medical Oncology, Seattle Cancer Care Alliance, The University of Washington, Seattle, Washington.
5. Department of Pulmonary Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas.
6. Department of Gastroenterology, The University of Texas MD Anderson Cancer Center, Houston, Texas.
7. Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas.